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Diodes Incorporated ZTX453STOA
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- Part No.:
- ZTX453STOA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- E-Line-3, Formed Leads
- Datasheet:
-
ZTX453STOA.pdf
- Description:
- TRANS NPN 100V 1A E-LINE
- Quantity:
- Payment:
- Shipping:
Inventory:3,847
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Product details
Overview
ZTX453STOA from Diodes Incorporated is an NPN silicon planar medium-power transistor with VCEO = 100 V, IC = 1 A continuous, PD = 1 W, and hFE = 40–200 at IC = 150 mA. It operates across –55°C to +150°C and is used in industrial power switching, relay drivers, and linear regulator pass elements.
For engineers reviewing the ZTX453STOA datasheet, ZTX453STOA pinout, ZTX453STOA application, or ZTX453STOA equivalent, key selection criteria include breakdown voltage margin (100 V), pulse current capability (2 A), thermal robustness (150°C TJ), RoHS/Green compliance, and E-Line package compatibility with through-hole PCB assembly.
Technical Context
The ZTX453STOA is a discrete NPN bipolar junction transistor optimized for medium-power linear and switching operation. Its 120 V VCBO, 100 V VCEO, and 5 V VEBO define safe operating limits under bias and transient conditions. The device delivers fT = 150 MHz at VCE = 10 V and IC = 50 mA, supporting moderate-frequency amplification and switching.
Thermal performance is anchored by a 1 W dissipation rating at 25°C ambient and a junction-to-ambient thermal resistance of ~125°C/W (estimated from PD and ΔT). ESD robustness includes 8 kV HBM and 400 V MM ratings, enabling handling in standard manufacturing environments without special precautions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 100 V - Maximum collector-emitter voltage before avalanche breakdown; enables use in 48 V and 72 V DC supply rails with safety margin. |
| IC | 1 A continuous - Sustained collector current rating; supports relay coils, LED arrays, and low-speed motor drivers. |
| PD | 1 W at TA = 25°C - Power dissipation limit without heatsink; requires thermal derating above 25°C ambient. |
| hFE | 40–200 - DC current gain range at VCE = 10 V; ensures reliable saturation drive with base currents ≥5–25 mA. |
| fT | 150 MHz - Gain-bandwidth product; supports audio-frequency amplification and PWM switching up to ~10–20 MHz. |
| ESD HBM | 8 kV - Human Body Model rating per JESD22-A114; allows direct handling during manual assembly without ionized air or wrist straps. |
Pinout & Package
Package: E-Line (TO-92 variant), molded plastic case with matte tin-plated leads, UL 94V-0 flammability rating, and 159 mg mass. Designed for through-hole mounting with 0.70 mm lead hole diameter.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Emitter (E) | Current sink terminal | Low-impedance return path; connects to ground or low-side load reference; must be thermally coupled for power dissipation. |
| Base (B) | Control input | Receives forward-biased drive current (typically 5–25 mA) to saturate transistor; requires series resistor for current limiting. |
| Collector (C) | Current source terminal | High-side connection to load or supply rail; carries full load current and dissipates majority of power in linear mode. |
Key Features
| Feature | Design Value |
|---|---|
| 100 V VCEO rating | Enables use in 48 V industrial control systems with >2× overvoltage margin against transients. |
| 1 A continuous IC | Supports driving solenoids, small relays, and LED strings without external current boosting. |
| 150 MHz fT | Permits stable operation as a Class-A audio preamplifier or high-speed switch in PWM dimming circuits. |
| 8 kV ESD HBM | Reduces need for ESD-protective packaging and handling protocols in contract manufacturing lines. |
| RoHS/Green compliant | Meets EU Directive 2011/65/EU and halogen-free requirements (<900 ppm Br/Cl, <1000 ppm Sb). |
Applications
| Industrial Relay Driver | Linear Voltage Regulator Pass Element |
|---|---|
Use Scenario: Driving 24–48 V DC coil relays in PLC I/O modules with microcontroller GPIO output. IC Role / Device Role / Timing Role: NPN switch providing current gain to interface low-current MCU pins with inductive loads. Use Value: 100 V VCEO absorbs coil flyback spikes; 1 A IC handles typical 50–500 mA relay coils; E-Line package fits standard 2.54 mm pitch headers. | Use Scenario: Pass transistor in adjustable 3–30 V, 500 mA linear regulators for analog sensor signal conditioning. IC Role / Device Role / Timing Role: Series pass element controlling output voltage via base bias; operates in active region. Use Value: 1 W PD supports 12 V dropout at 500 mA; hFE range ensures predictable base drive; TO-92 footprint simplifies thermal layout. |
| DC Motor Speed Control | LED Constant-Current Driver |
Use Scenario: Low-frequency PWM-driven switch for brushed DC motors in HVAC actuators and valve positioners. IC Role / Device Role / Timing Role: Medium-power switching transistor in emitter-follower or common-emitter configuration. Use Value: 2 A ICM accommodates motor startup surges; 150 MHz fT ensures clean turn-on/turn-off edges at 1–5 kHz PWM. | Use Scenario: Constant-current sink for high-brightness white LEDs in signage and indicator panels. IC Role / Device Role / Timing Role: Linear current regulator using emitter resistor feedback and base voltage reference. Use Value: Tight VCE(SAT) ≤ 0.7 V at 150 mA minimizes power loss; 159 mg mass aids thermal coupling to PCB copper pour. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN medium-power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZTX450 | VCEO = 60 V, IC = 1 A, PD = 1 W, fT = 100 MHz | Limited to ≤36 V systems; lower fT reduces high-frequency switching fidelity. | Select when cost sensitivity outweighs voltage margin needs in 24 V applications. |
| MPSA42 | VCEO = 300 V, IC = 500 mA, PD = 625 mW, hFE = 40–200 | Higher voltage rating but lower current and power; TO-92 package with same pinout. | Prefer for high-voltage, low-current snubber or HV logic interface where 1 A is not required. |
Compared with ZTX453STOA, ZTX450 trades 40 V breakdown headroom for identical power and gain, while MPSA42 sacrifices 500 mA continuous current and 375 mW dissipation to achieve triple the VCEO; both retain E-Line compatibility but require revalidation of thermal and drive design margins.
Availability
ZTX453STOA is available at Aetrix Electronics and suitable for industrial relay drivers, linear regulator pass elements, DC motor speed control, and LED constant-current drivers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ZTX453STOA includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for industrial, automotive, and computing markets.
The ZTX series targets medium-power discrete applications demanding ruggedness, consistent gain, and wide-temperature operation-designed specifically for industrial control, power management, and signal conditioning where TO-92 form factor and reliability are critical.
FAQ
What is the maximum safe operating temperature for ZTX453STOA?
The ZTX453STOA has a specified junction temperature range of –55°C to +150°C. Its absolute maximum operating temperature is 150°C, and sustained operation above 125°C requires careful thermal design, including PCB copper area, airflow, or derating of PD per the datasheet's thermal resistance curve.
Is ZTX453STOA pin-compatible with other E-Line transistors like ZTX450 or MPSA42?
Yes-ZTX453STOA uses the standard E-Line (TO-92 variant) pinout: Emitter (pin 1), Base (pin 2), Collector (pin 3), matching ZTX450 and MPSA42. Mechanical dimensions and lead spacing are identical, enabling drop-in replacement on existing footprints, though electrical parameters must be verified per application.
Does ZTX453STOA require a heatsink in 1 A continuous operation?
No heatsink is required for 1 A continuous operation at ambient temperatures ≤50°C if mounted on ≥1 cm² of 1 oz copper with thermal vias. At 25°C ambient, its 1 W PD yields ~125°C/W θJA; exceeding 75°C ambient or operating near 1 W continuously demands thermal enhancement to stay within the 150°C TJ limit.
How does the 8 kV ESD HBM rating impact manufacturing handling?
The 8 kV HBM rating meets JEDEC Class 3B, allowing ZTX453STOA to withstand typical electrostatic discharges encountered during manual PCB assembly, tape-and-reel handling, and automated placement without dedicated ESD flooring or ionizers-reducing process overhead while maintaining yield in standard SMT/DIP lines.
ZTX453STOA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- E-Line-3, Formed Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 1 A
- Voltage - Collector Emitter Breakdown (Max):
- 100 V
- Vce Saturation (Max) @ Ib, Ic:
- 700mV @ 15mA, 150mA
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 40 @ 150mA, 10V
- Power - Max:
- 1 W
- Frequency - Transition:
- 150MHz
- Operating Temperature:
- -55°C ~ 200°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- E-Line (TO-92 compatible)
ZTX453STOA FAQ
1.How can I place an order for ZTX453STOA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZTX453STOA on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ZTX453STOA reliable?
The price and inventory of ZTX453STOA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZTX453STOA is usually 5 days.
3.What payment methods are accepted for ZTX453STOA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZTX453STOA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZTX453STOA?
ZTX453STOA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZTX453STOA order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ZTX453STOA?
For technical support, including ZTX453STOA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZTX453STOA requirements.
6.How does Aetrix verify that ZTX453STOA is sourced from the original manufacturer or authorized distributors?
All ZTX453STOA products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ZTX453STOA meets industry standards.
7.What is the process for return or replacement of ZTX453STOA?
All ZTX453STOA units undergo pre-shipment inspection (PSI). If there is an issue with ZTX453STOA, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ZTX453STOA part is unused and in its original packaging.
Return procedure for ZTX453STOA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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